Increase speed

[stefanak-michal]

Hi.

I've two suggestion to improve speed of curl connection.

1. Class Transport constructor should call gethostbyname() if the host isn't IP. It will resolve hostname to IP and it's faster if you avoid DNS resolve every time.

$this->host = filter_var($ip, FILTER_VALIDATE_IP) ? $host : gethostbyname($host);

2. Enable gzip on cURL curl_setopt($c, CURLOPT_ENCODING, '')